"""
Core Configuration
==================
Application settings using Pydantic Settings
"""

from pydantic_settings import BaseSettings
from typing import List
import torch


class Settings(BaseSettings):
    """Application settings"""
    
    # Model Configuration
    MODEL_NAME: str = "vinai/phobert-base"
    MODEL_PATH: str = "./models/PhoBERTFineTuned_best.pth"
    MAX_LENGTH: int = 128
    DEVICE: str = "cuda" if torch.cuda.is_available() else "cpu"
    
    # API Configuration
    API_TITLE: str = "Toxic Text Detection API"
    API_VERSION: str = "1.0.0"
    API_DESCRIPTION: str = "Vietnamese toxic text detection with gradient-based explainability"
    API_HOST: str = "0.0.0.0"
    API_PORT: int = 8000
    API_RELOAD: bool = True
    
    # CORS
    ALLOWED_ORIGINS: List[str] = ["*"]
    
    # Analysis Settings
    GRADIENT_STEPS: int = 20
    PERCENTILE_THRESHOLD: int = 75
    MIN_WORD_LENGTH: int = 2
    
    # Logging
    LOG_LEVEL: str = "INFO"
    
    class Config:
        env_file = ".env"
        case_sensitive = True


# Singleton instance
settings = Settings()